Not flooding - just wet roads.
We were travelling though North Norfolk to visit a friend when we saw a large bird spreadeagled in front of us on the road - it turned out to be a Crested Grebe that had somehow damaged itself - no sign of having been hit by another vehicle.
Not being able to find a vet to take care of it, we took it to a local seal sanctuary who agreed to take care of it and explained that, on wet days roads resemble rivers and occasionally try to land on them.
A story we heard of down in the West of England:
An American tourist was driving around the small roads in Devon in his big car, when he came to a ford - a river crossing the road.
Not being sure how deep it was he reversed for a few hundred yards until he came to a farmer leaning on a gate and explained his predicament.
The Farmer said, "You'll be all right sir, it's not very deep", so the Yank thanked him and drove off.
He started to drive through the water, which got deeper and deeper until it began to lap into the car, so, feet awash, he backed out and down the road as far as the farmer again.
"I thought you said that water wasn't very deep, man!!"
"Well", said the old man, "It only comes about halfway up my ducks."
Jim Carroll